Type-writing-machine key and type-bar operating mechanism.



J. ALEXANDER.

TYPEWRITING MACHINE KEY AND TYPE BAR OPERATING MECHANISM.

APPLIUATION FILED PEBJG, 1911.

1,046,710. Patented Dec. 10,1912.

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= "ll iii i iilln Ill/l/EAITOR Jessg/lcx nder" WITNESSES J. ALEXANDER: TYPE WRITING MACHINE KEY AND TYPE BAR OPERATING MECHANISM.

I APPLICATION FILED I'EB.16, 1911. 1,046,710. Patented Dec. 10,1912.

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WITNESSES nvmvrol? mam UNITED STATES r fgrnufr orrron.

JESSE ALEXANDER, or NEW YORK, N. Y.,-AssIe1\roR or SIXTY-TWO- oNE-HuumgnnrrHs we I. IVL'DA COSTA, or nocK'xfirLLE crnv'rna, NEW. YORK:

TYPE-WRITING-MACHINE KEY AND TYPE-3A3 ornna'rine MECHANIQSMQ I I Specification of Letters Patent. 1 Y PatfltfllDQ, 10,1912.

Application filed February 16 1911. Serial No. 608,928. I

To all whom it may concern:

Be it known that I, Jnssn ALEXANDER, a=citizen of the United States, and resident of New York, in the county of Kings 'and State of New York, have invented certain new and useful Improvements in'Type-Vriting-Machine Key and Type-Bar Operating Mechanism, of which the following is a specification.

Hy invention relates to improvements in' that will'operate very rapidly and permanently and will afford great ease in operakey levers are maintained in a normal posiraised position by means tion with an extremely light touch of the finger levers and is especially adapted to the front stroke visible writing machine.

In the form illustrated the type bars are carried by a segmental-type bar plate and may be operated by sub-levers connected to the key levers by intermediate links- The tion by means of springs. Theconnecting links are sustained-by a spring pressed frame and the type bars are adapted to engage a.

spring pressed universal bar.

The principles of the invention as applied to a front stroke writing machine are illustrated in theaccompanying two sh eets of drawings.-

Figure 1, is a longitudinal section. of 'a' machine showing one unit of the key and type bar mechanism in. full lines in the normal position of rest and showing a type bar dotted in a position intermediate the writing and rest position. Fig- 2, is a. perspective view of a gype bar of my invention Flg. 3, 1s alperspectlve, new of a sub-lever or type bar actuator. Fig. 4, is a View simi-- lar to Fig. 1 but showing theparts in the printing or writing position. Fig; 5, is a fragmental front view showing'the method of supporting atype bar. Fig. 6, is a perspective view of the retain ng frame for the connecting links.

The arrangement and shape of the key levers may be as desired. Each key lever 1 is pivoted at 2 to the frame of the machine and is normallyheld in its. upward or of a suitable form of spring such .as 3.

Each type bar 4 is pivoted in'the segmental type bar carrying plate 5 for instance, on a pivot (=3, its pivoted end being located in aslot 7f The front ends of the 'type bars are supported on a shelf 8 in a the normal position suitable manner when in of rest.'.-'

In the same slot with each type bar located a sub-lever or actuator 9 pivoted on the same pivot 6 with the, typebar. ,A

substantially vertical link 10 connects the actuator 9 with the key lever-.1 being connected to the key lever by the pivot 11 and Each link is preferably connected to the actuator on the same face as the type bar 4 so as to afford a more direct pull.

The connecting-links are all pressed 1113- ward or retained by means of a pivoted spring pressed frame having a cross bar 16, pivoted at 17 and pressed upwardly by one or more springs such as '18 .The cross bar engages beneath the rearwar'dly' extending lugs 19 of the connecting links.

The universal bar 20 is preferably curved and extends back of all the type'bars. Its

front end is guided horizontally for instance, by means of a pin 21 and its rear end is supported from the pivot 22 by means of a link 23. The latter is normally pressed forward by a spring 24 so as to hold the {universal bar 20 in its forward position.

Each type bar is provided with the shoulder 25 adapted to engage the universal bar 20 in the striking or printing position as shown in Fig. 4 so as to force the universal bar to the rear. This gives additional compression tot-he spring 24 so as to tend to throw the type bar downward as soon as it is raised. The spring 24 may be adjusted by the adjusting screw 26 and clamped by the set nut 27. By this construction the key. levers are all held yielldingly in place by meansv of inde pendent springs and the connected links are held yieldingly in place by a spring pressed frame. The type bars when in their normal position of restare simply supported at the-110 j bar carries'the typebar quickly 'to the print-;-

'ingposition. Whenat the end of this print- I opposite endsan d are not operativelyicons' Ine'cted with the key lever and operating mechanism. Theactuator is normally not V such constructions.

connected with the type bar as shown in v Fig. 1. The result is that when the key lever is depressed the parts of the key-lever,

connecting link and actuator have an appreciable time in which to act by momentum before the actuator strikes the lug 14 of the type bar. The sudden blow upon the ,WPe

ing stroke, the type bar hasacquiredcon-- siderable momentum it engages the .univer-.

.sal bar so as toaccomplish theoperations usually accomplishedbythe universal bar .in

its pressure tending to returnthe type bars.

The result of this construction is that a very slight touch upon the key lever is sufiicient to throw the type bar tothe printing position without requiring av full downward a stroke of'the lever, the type bar being free to move to the printing position when given sufiicient' momentum so that the actuator 9, connecting link and key lever may-be on its vway ,back to the normal position'hefore the type bar reaches the printing position. The independent movement of'the type bar-is invention.

What I claim-is5 I 4 Copies of this patent may be obtained for m units each, by' ac ldrsislngtlie Commissioner 01' Pat ents."

1. In a typewriter key and type bar operating mechanism, a pivoted type bar, an actuator having a limited movement unconnected with said type bar, -a spring pressed universalbar adapted to return the type bar,'.a spring for returning said actuator in:

' dependently'of said type bar and a key lever I connected to said actuator.

The; universal bar has 2. In a typewriting key and .type bar operating "mechanism, a pivoted type bar, an actuator pivoted therewith but normally disengaged therefrom, a spring pressed universal'bai' adaptedto return'the type bar, a

key lever and a spring pressed connecting link between said lever and said actuator.

3. In a key and type bar operatingmechanism, a pivoted type bar,'an actuatorjpivoted therewith fbut normally disengaged therefrom, a spring pressed key lever and a spring pressed connecting link betweens'aid lever and said actuator.

4. In a key and type-bar operating mech-' anism, a pivoted type. bar having a projectmg lug, an actuator pivoted therewith but normally disengaged therefrom and having I an oifset end for engaging said-lug, akey lever and a connecting link between saidlever and said actuator.

In a key and type bar operating mech-v -an1sm,'a pivoted type b'a-r', apivoted actua- ---tor having; an oif-set shoulder for engaging said type bar and having a limited"movementunconnected with said type bar and'a key lever .connected to said actuator and means for returning said actuator independently' of said type bar. 7

6. Ina key and type bar anism,- a slotted platepa type bar and an actuator having a limited movement unconnected with said type bar and both pivotally' carried by said plate and a key lever connected to said actuator and means vfor returning said actuator independently of said type bar.

7. Ina-key operating mech-- and type bar operating mechanism, a type bar, an actuator, a common pivot for said bar and actuator, a key lever and a COIHIBClZlOIl between said lever and said actuator.

. JESSE ALEXANDER. Witnesses THURs'roN, F. M. DA Cos'rA.

I fwesh'lngttin, D. 0'. I 

